---
id: CVE-2026-58240
title: >-
  SAP NetWeaver Message Server does not sufficiently validate the authenticity
  of internal application server components during registration
summary: >-
  SAP NetWeaver Message Server does not sufficiently validate the authenticity
  of internal application server components during registration. An
  unauthenticated attacker with network access to the affected service could
  exploit this weakne…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-308
vendor: SAP_SE
product: SAP NetWeaver (Message Server)
affected:
  - sap_netweaver_message_server KERNEL 9.16
  - sap_netweaver_message_server 9.18
  - sap_netweaver_message_server 9.19
  - sap_netweaver_message_server 9.20
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T05:17:26.417'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58240'
references:
  - url: 'https://me.sap.com/notes/3759472'
    label: cna@sap.com
  - url: 'https://url.sap/sapsecuritypatchday'
    label: cna@sap.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-08T09:54:36.426528Z'
epss: 0.00528
epssPercentile: 0.42398
ingestedAt: '2026-09-08T15:33:26.981Z'
---

## Overview

SAP NetWeaver Message Server does not sufficiently validate the authenticity of internal application server components during registration. An unauthenticated attacker with network access to the affected service could exploit this weakness to register an unauthorized component and potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.